Fine blanking method and device

A technology of fine blanking and punch, which is applied in the field of fine blanking and the fine blanking device that realizes this method, can solve the problems of plastic exhaustion, fine blanking gears that have not been seen, and limit the use range of fine blanking technology, and achieve the goal of increasing the limit thickness Effect

Inactive Publication Date: 2006-10-18
BEIJING BRANCH JIKE DEV SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The degree of deformation increases with the progress of the fine blanking process, and finally the plasticity is exhausted to cause tearing. Therefore, the specification of the strong blanking fine blanking process gives the maximum thickness of different materials that can be fine blanked, which greatly limits the scope of use of the fine blanking process.
Still taking the gear as an example, there is no fine blanking gear with a thickness of more than 7 mm.

Method used

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  • Fine blanking method and device
  • Fine blanking method and device
  • Fine blanking method and device

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Embodiment Construction

[0020] The fine blanking method of the present invention has three stages, and the schematic diagram of the reciprocating forming fine blanking process is shown in Fig. 2(a), Fig. 2(b), Fig. 2(c) and Fig. 2(d). The reciprocating fine punching die consists of two dies and two punches, as shown in Figure 2(a). The lower die 201 is fixed, and the forming forces of the upper die 202, upper punch 203, and lower punch 204 are individually adjustable, and pressure can be applied according to preset procedures, and three types of locking, high pressure and given pressure can be realized. state. In the first stage of forming, the lower punch 204 and the upper die 202 are locked, the upper punch 203 is at zero pressure, the upper die 202 moves downward, and the material of the blank 205 flows into the upper die cavity, as shown in Figure 2(b) . In the second stage of forming, the upper die 202 and the upper punch 203 are locked, the lower punch 204 has zero pressure, and the blank mat...

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Abstract

The invention provides a fine blanking method. Firstly, metal materials are put into a mold composed of two dies and two punches; secondly, the lower punch and the upper die are in a locked state, and the upper punch is in zero pressure. The upper die goes down, part of the material flows into the upper die cavity; the upper die and upper punch are locked again, the lower punch is zero pressure, and when the upper die and upper punch continue to descend, part of the material flows into the lower die; finally Keep the upper punch in a locked state, set the upper die to a given pressure state to provide blank-holding force, and the lower punch to a given pressure state to provide counter pressure. When the upper punch continues to move downward, carry out continuous blanking , to complete the entire fine blanking process. The invention also provides a device for carrying out the method, equipped with an independently working annular plunger, the force generated by the annular plunger can be applied to an upper die for squeezing the waste area of ​​the fine blanking blank. The invention can greatly increase the fine-blanking limit thickness of the material to realize the fine-blanking of thick plates.

Description

technical field [0001] The invention relates to a stamping method of a sheet metal, in particular to a fine blanking method. The invention also relates to a fine blanking device for implementing the method. Background technique [0002] In the metal processing industry, a large number of sheet metal stamping processes are used, among which fine blanking technology is an advanced manufacturing technology. A single fine blanking can obtain parts with a dimensional tolerance of IT7~8 and a shear surface roughness of Ra0.8~0.4μm. Equivalent to the quality of grinding in machining. Taking a gear with a module of 3, a number of teeth of 18, and a thickness of 5 mm as an example, it takes about 6 minutes to produce each piece by machining, and more than 6 pieces can be produced per minute by fine blanking. [0003] figure 1 Shown is a schematic diagram of traditional strong blanking fine blanking, the workpiece 105 is located between the blank holder 101 , the punch 102 , the di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/02
Inventor 涂光祺李荣洪赵彦启彭群杜贵江郑鹏飞袁贺强杨瑞峰葛书平
Owner BEIJING BRANCH JIKE DEV SCI & TECH
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